CVE-2024-53120 (GCVE-0-2024-53120)
Vulnerability from cvelistv5
Published
2024-12-02 13:44
Modified
2026-08-05 11:43
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: CT: Fix null-ptr-deref in add rule err flow In error flow of mlx5_tc_ct_entry_add_rule(), in case ct_rule_add() callback returns error, zone_rule->attr is used uninitiated. Fix it to use attr which has the needed pointer value. Kernel log: BUG: kernel NULL pointer dereference, address: 0000000000000110 RIP: 0010:mlx5_tc_ct_entry_add_rule+0x2b1/0x2f0 [mlx5_core] … Call Trace: <TASK> ? __die+0x20/0x70 ? page_fault_oops+0x150/0x3e0 ? exc_page_fault+0x74/0x140 ? asm_exc_page_fault+0x22/0x30 ? mlx5_tc_ct_entry_add_rule+0x2b1/0x2f0 [mlx5_core] ? mlx5_tc_ct_entry_add_rule+0x1d5/0x2f0 [mlx5_core] mlx5_tc_ct_block_flow_offload+0xc6a/0xf90 [mlx5_core] ? nf_flow_offload_tuple+0xd8/0x190 [nf_flow_table] nf_flow_offload_tuple+0xd8/0x190 [nf_flow_table] flow_offload_work_handler+0x142/0x320 [nf_flow_table] ? finish_task_switch.isra.0+0x15b/0x2b0 process_one_work+0x16c/0x320 worker_thread+0x28c/0x3a0 ? __pfx_worker_thread+0x10/0x10 kthread+0xb8/0xf0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2d/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK>
References
Impacted products
Vendor Product Version
Linux Linux Version: 7fac5c2eced36f335ee19ff316bd3182fbeda823
Version: 7fac5c2eced36f335ee19ff316bd3182fbeda823
Version: 7fac5c2eced36f335ee19ff316bd3182fbeda823
Version: 7fac5c2eced36f335ee19ff316bd3182fbeda823
Version: 7fac5c2eced36f335ee19ff316bd3182fbeda823
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{
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        "providerMetadata": {
          "dateUpdated": "2025-11-03T22:29:26.030Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c"
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.14"
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              "version": "0",
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              "version": "5.15.174",
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              "status": "unaffected",
              "version": "6.1.119",
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              "status": "unaffected",
              "version": "6.6.63",
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              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.10",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12",
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      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: CT: Fix null-ptr-deref in add rule err flow\n\nIn error flow of mlx5_tc_ct_entry_add_rule(), in case ct_rule_add()\ncallback returns error, zone_rule-\u003eattr is used uninitiated. Fix it to\nuse attr which has the needed pointer value.\n\nKernel log:\n BUG: kernel NULL pointer dereference, address: 0000000000000110\n RIP: 0010:mlx5_tc_ct_entry_add_rule+0x2b1/0x2f0 [mlx5_core]\n\u2026\n Call Trace:\n  \u003cTASK\u003e\n  ? __die+0x20/0x70\n  ? page_fault_oops+0x150/0x3e0\n  ? exc_page_fault+0x74/0x140\n  ? asm_exc_page_fault+0x22/0x30\n  ? mlx5_tc_ct_entry_add_rule+0x2b1/0x2f0 [mlx5_core]\n  ? mlx5_tc_ct_entry_add_rule+0x1d5/0x2f0 [mlx5_core]\n  mlx5_tc_ct_block_flow_offload+0xc6a/0xf90 [mlx5_core]\n  ? nf_flow_offload_tuple+0xd8/0x190 [nf_flow_table]\n  nf_flow_offload_tuple+0xd8/0x190 [nf_flow_table]\n  flow_offload_work_handler+0x142/0x320 [nf_flow_table]\n  ? finish_task_switch.isra.0+0x15b/0x2b0\n  process_one_work+0x16c/0x320\n  worker_thread+0x28c/0x3a0\n  ? __pfx_worker_thread+0x10/0x10\n  kthread+0xb8/0xf0\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork+0x2d/0x50\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork_asm+0x1a/0x30\n  \u003c/TASK\u003e"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable code is driven entirely by received network packets \u2014 conntrack entries created by remote peers\u0027 connections are handed to `mlx5_tc_ct_block_flow_offload()` via the nf_flow_table offload workqueue, with no local action required. A remote attacker sending traffic through an mlx5 NIC configured for act_ct hardware offload reaches the failing add path directly.\nAC:L - The attacker controls the trigger: opening a large number of NAT\u0027d connections exhausts the finite hardware CT/steering table so `ct_rule_add()` returns an error, and crafted traffic (tunneled or non-TCP/UDP/GRE flows) can also fail `mlx5_ct_fs_smfs_ct_validate_flow_rule()` deterministically. Every NAT\u0027d entry takes the `mh == NULL` branch, so any such failure crashes.\nPR:N - No credentials or account on the target are needed \u2014 only the ability to send packets that traverse the offloaded connection-tracking datapath. The CT-offload configuration is a deployment precondition set by the administrator, not a privilege the attacker must hold.\nUI:N - The offload work is queued automatically by the conntrack/flow-table machinery when connections become established; no victim action is involved.\nS:U - The fault and its consequences are confined to the host kernel that owns the mlx5 device; no security authority boundary such as a VM or IOMMU domain is crossed.\nC:N - The defect is a read of a fixed offset from a NULL pointer, which faults immediately; no kernel memory contents are returned to or observable by the attacker.\nI:N - No attacker-controlled data is written and no control-flow hijack primitive is produced \u2014 the dereferenced pointer is unconditionally NULL, not attacker-influenced, so `mmap_min_addr` prevents any write or execution primitive.\nA:H - The dereference produces a kernel oops in the flow-offload worker (a full panic with `panic_on_oops`), killing the workqueue thread and breaking the CT offload path; it can be re-triggered by continued connection flooding, and hardware modify-header and label-mapping resources are leaked on each occurrence."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:43:50.881Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/882f392d9e3649557e71efd78ae20c86039ffb7c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c7c70ff8b696cfedba350411dca736361ef9a0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/06dc488a593020bd2f006798557d2a32104d8359"
        },
        {
          "url": "https://git.kernel.org/stable/c/6030f8bd7902e9e276a0edc09bf11979e4e2bc2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/e99c6873229fe0482e7ceb7d5600e32d623ed9d9"
        }
      ],
      "title": "net/mlx5e: CT: Fix null-ptr-deref in add rule err flow",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-53120",
    "datePublished": "2024-12-02T13:44:51.098Z",
    "dateReserved": "2024-11-19T17:17:24.994Z",
    "dateUpdated": "2026-08-05T11:43:50.881Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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